方解石制备碳酸钙晶须的影响因素及机理

人工晶体学报 ›› 2021, Vol. 50 ›› Issue (6): 1112-1122.

方解石制备碳酸钙晶须的影响因素及机理

于亚杰¹, 郑强¹, 刘海利¹, 邢润¹, 李雪^1,2

1.沈阳化工大学化学工程学院,辽宁省化工应用重点实验室,沈阳 110142;
2.辽宁精细化工协同创新中心,沈阳 110142

收稿日期:2021-02-24 出版日期:2021-06-15 发布日期:2021-07-08
通讯作者: 李雪,博士,教授。E-mail:ltmlx@163.com
作者简介:于亚杰(1993—),女,内蒙古自治区人,硕士研究生。E-mail:821190260@qq.com
基金资助:
菱镁固废化工材料高值利用技术与基地集成示范(2020YFC1909300);辽宁省自然科学基金(L2015020609);辽宁省创新团队项目(LT2013010);沈阳市科技局项目(F16-208-6-00)

Influencing Factors and Mechanism of Calcium Carbonate Whiskers Prepared from Calcite

YU Yajie¹, ZHENG Qiang¹, LIU Haili¹, XING Run¹, LI Xue^1,2

1. Key Laboratory of Chemical Application of Liaoning Province, School of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China;
2. Liaoning Fine Chemicals Collaborative Innovation Center, Shenyang 110142, China

Received:2021-02-24 Online:2021-06-15 Published:2021-07-08

摘要/Abstract

摘要： 以方解石矿石为原料,利用制备的重镁水(Mg(HCO₃)₂)及中间产物氯化钙制备文石型碳酸钙晶须,并采用SEM、XRD及EDS对产品进行表征。探究了重镁水与氯化钙反应过程中反应温度、反应时间、镁钙浓度比、重镁水浓度以及搅拌速度对碳酸钙晶须形貌的影响。通过单因素实验得出了最佳工艺条件:温度40 ℃、反应时间2 h、镁钙浓度比6∶1、重镁水浓度0.14 mol/L、搅拌速度150 r/min。在此条件下,制得了长度为40~65 μm、直径为0.6~1.5 μm、长径比为25~45的文石型碳酸钙晶须。

关键词: 方解石, 重镁水, 晶须, 碳酸钙

Abstract: Calcite was used as raw material, the prepared heavy magnesium water (Mg(HCO₃)₂) and the intermediate product calcium chloride were used to prepare aragonite calcium carbonate whiskers, and the products were characterized by SEM, XRD and EDS. The effects of reaction temperature, reaction time, concentration ratio of magnesium to calcium, concentration of heavy magnesium water and stirring speed on the morphology of calcium carbonate whiskers during the reaction of heavy magnesium water and calcium chloride were explored. The best process conditions are obtained through single factor experiments: temperature of 40 ℃; reaction time of 2 h; magnesium-calcium concentration ratio of 6∶1; heavy magnesium water concentration of 0.14 mol/L; stirring speed of 150 r/min. Under these conditions, aragonite calcium carbonate whiskers with a length of 40~65 μm, a diameter of 0.6~1.5 μm, and an aspect ratio of 25~45 were prepared.

Key words: calcite, heavy magnesium water, whisker, calcium carbonate

中图分类号:

于亚杰, 郑强, 刘海利, 邢润, 李雪. 方解石制备碳酸钙晶须的影响因素及机理[J]. 人工晶体学报, 2021, 50(6): 1112-1122.

YU Yajie, ZHENG Qiang, LIU Haili, XING Run, LI Xue. Influencing Factors and Mechanism of Calcium Carbonate Whiskers Prepared from Calcite[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(6): 1112-1122.

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